Compile MQTT library & need to update to latest 5.11

SGaist

Hi,

Use the full path to the qmake executable of the Qt version your want to use.

You are currently using your distribution provided Qt.

aha_1980

Answer :- it installed successfully but after installation got "qt version of 5.2.1" on ubuntu 14.04 system instead of "qt version of 5.11.1"

Ah sorry, I didn't get this :(

As @SGaist said, you must call qmake with full path if you have multiple versions installed.

But then it should work - good luck.

Regards

bhu24

@SGaist thanks got qmake 5.11.1 and now got error while compiling "qtmqtt" Library

error: error: unrecognized command line option '-std=c++1z'
error: error: unrecognized command line option '-Wdate-time'

@aha_1980 thnaks to you also

aha_1980

@bhu24 said in Compile MQTT library & need to update to latest 5.11:

error: error: unrecognized command line option '-std=c++1z'

I'm not sure why c++1z (= "c++17") is forced, but your compiler may be too old for that.

Can you see if c++1z is given in any of the .pro or .pri files?

bhu24

@aha_1980 still issue is not resolved

Previous - error: error: unrecognized command line option '-std=c++1z'
NEW - error: [.pch/Qt5Mqtt.gch/c++] Error 1

one error gone but new issue arise!!!

Solved issue - error: error: unrecognized command line option '-Wdate-time'

SGaist

That's because you're currently using an out of date compiler.

bhu24

![alt text]( image url)

Here i am sending screenshot's of my 1. Qt version 2. Compilers 3. Cmake
So please let me is any thing i am missing so facing this issue!!!!!!

jsulm

@bhu24 This is quite a big list of compilers! Do you really need all of them (4.7, 4.8, 4.9)?
Which compiler do you use? Which is set as compiler in the Kit you're using?

bhu24

@jsulm my requirement is to compile "MQTT" library which need qt 5.11.1 higher version and compiler 4.9 as per my knowledge please suggest me solution on same.
Thanks for help!!

jsulm

@bhu24 Did you check whether GCC 4.9 is really set in your Kit?

bhu24

@jsulm yes as you can see in screen shot

Got compiler output window as follows:
home/balkrishna/Desktop/qt/qtmqtt/include/QtMqtt/QtMqttDepends -o .pch/Qt5Mqtt.gch/c++
g++: error: unrecognized command line option '-std=c++1z'
make[2]: Leaving directory /home/balkrishna/build-qtmqtt-Qt_5_11_1-Debug/src/mqtt' make[1]: Leaving directory /home/balkrishna/build-qtmqtt-Qt_5_11_1-Debug/src'
make[2]: *** [.pch/Qt5Mqtt.gch/c++] Error 1
make[1]: *** [sub-mqtt-make_first] Error 2
make: *** [sub-src-make_first] Error 2
12:29:01: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project qtmqtt (kit: Qt 5.11.1)
When executing step 'Make'
In Genral message window shows following :

/home/balkrishna/Qt5.11.1/5.11.1/gcc_64/mkspecs/features/qmake_use.prf(6): 'take_first' is not a recognized replace function.
Project ERROR: Library '' is not defined.
/home/balkrishna/Qt5.11.1/5.11.1/gcc_64/mkspecs/features/qmake_use.prf(6): 'take_first' is not a recognized replace function.
Project ERROR: Library '' is not defined.

In Issue window show following:

error: error: unrecognized command line option '-std=c++1z'
error: [.pch/Qt5Mqtt.gch/c++] Error 1

Any thing is wrong from my side so please let me know and suggest which things should i cross check to resolve this issue

jsulm

@bhu24 said in Compile MQTT library & need to update to latest 5.11:

yes as you can see in screen shot

No, I can't as you did not post the screen-shot of your Kit...

bhu24

@jsulm ![alt text]( image url)

i tried all one by one

/usr/bin/x86_64-linux-gnu-gcc-4.9
/usr/bin/x86_64-linux-gnu-g++-4.9
/usr/bin/x86_64-linux-gnu-cpp-4.9

jsulm

@bhu24 Can you show your pro file

bhu24

@jsulm ![alt text]( image url)

I am using "qtmqtt" folder to compile mqtt library is right or wrong??? please let me know

jsulm

@bhu24 I'm wondering from where this -std=c++1z is coming.
Usually it should be configured like

CONFIG += c++11

in one of the pro files.

bhu24

@jsulm
i tried that also one by one but no use

CONFIG += c++11
CONFIG += c++12
CONFIG += c++13

jsulm

@bhu24 What I mean is: you should check the pro files and see whether the c++ standard is set there and how.
Note: there is no C++12 or C++13

bhu24

@jsulm in mqtt.pro file they mentioned c++ standard.

from here i download that file of "qtmqtt"

git clone git://code.qt.io/qt/qtmqtt.git

jsulm

@bhu24 Can you show how they mentioned c++ there, I don't want to check out the project.